Vacuum switch tube with built-in shielding case

Abstract

The utility model discloses a vacuum switch tube with a built-in shielding case, which comprises a shell main body, the top end of the shell main body is connected with a top cover, the bottom end of the shell main body is connected with a bottom cover, a static conducting rod extending into the shell main body is arranged on the top cover in a penetrating manner, and a movable conducting rod extending into the shell main body is arranged on the bottom cover in a penetrating manner. One end of the static conducting rod close to the movable conducting rod is provided with a static contact, the movable conducting rod is provided with a movable contact cooperatively connected with the static contact, the static conducting rod is fixedly provided with a static shielding case located around the static contact, the movable conducting rod is fixedly provided with a movable shielding case, and the static shielding case is provided with an annular groove cooperating with the movable shielding case. Compared with the prior art, the utility model has the advantages that the shielding case is arranged in the shell, so that the volume of the whole device can be reduced; through cooperation of the fixed shielding case and the movable shielding case, the sealing performance is ensured, and the shielding case can be well matched with the device for use at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum switch tube technical field, specifically point to shield cover built -in vacuum switch tube. BACKGROUND

[0002] In the power system, vacuum switch tube is a kind of commonly used electrical equipment, for controlling the on-off of circuit. However, traditional vacuum switch tube has some problems, such as large volume, heavy weight, inconvenient installation etc. In addition, since vacuum switch tube needs to work in high voltage, large current environment, therefore, the requirement for insulation performance and arc extinguishing performance is higher. Traditional vacuum switch tube usually adopts external structure, needs additional insulation and arc extinguishing device, increases the complexity and cost of equipment. Therefore, a shield cover built-in vacuum switch tube is needed. SUMMARY

[0003] The utility model solves the technical problem that volume is big and is inconvenient to install, and equipment production cost is high, provides shield cover built-in vacuum switch tube.

[0004] To solve the above technical problem, the technical scheme provided by the utility model is as follows: shield cover built-in vacuum switch tube, including shell main part, the top end of shell main part is connected with top cover, the bottom end of shell main part is connected with bottom cover, the top cover is penetrated with static conducting rod extending into shell main part, the bottom cover is penetrated with dynamic conducting rod extending into shell main part, the static conducting rod is equipped with static contact near one end of dynamic conducting rod, the dynamic conducting rod is equipped with dynamic contact matched with static contact, the static conducting rod is fixed with static shield cover located around static contact, the dynamic conducting rod is fixed with dynamic shield cover, the static shield cover is equipped with annular groove matched with dynamic shield cover, the other end of dynamic shield cover is slidably placed in annular groove.

[0005] As improvement, the inner wall of static shield cover is fixed with rubber sealing strip closely attached to the inner wall of dynamic shield cover, improve the sealing property, ensure the effect of shielding electromagnetic signal of shield cover.

[0006] As improvement, the dynamic conducting rod is fixed with connecting plate located below dynamic contact, the connecting plate and the top surface of bottom cover are connected with corrugated pipe located around dynamic conducting rod, improve the sealing property between dynamic conducting rod and bottom cover through corrugated pipe, thereby improve the sealing property of the vacuum switch tube.

[0007] As improvement, the dynamic conducting rod is slidably connected with bottom cover, one end of dynamic conducting rod located outside shell main part is connected with external driving equipment, facilitate driving dynamic contact to move, realize the on and off of circuit.

[0008] As an improvement, the shell body is made of ceramic material, which has excellent insulation performance, can withstand high voltage and large current working environment, has excellent high temperature resistance, and reduces the weight of the device.

[0009] The utility model has compared with prior art, its advantages are in: through built-in shielding case in casing, can reduce the volume of whole device,

[0010] Through cooperation of fixed shielding case and mobile shielding case, the use of the device can be well matched while ensuring the sealing, and the device can be conveniently installed and disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the perspective drawing of the shielding case built-in vacuum switch tube of the utility model.

[0012] Figure 2 It is the first cross section perspective drawing of the shielding case built-in vacuum switch tube of the utility model.

[0013] Figure 3 It is the second cross section perspective drawing of the shielding case built-in vacuum switch tube of the utility model.

[0014] Figure 4 It is the third cross section perspective drawing of the shielding case built-in vacuum switch tube of the utility model.

[0015] As shown in the figure: 1, shell body, 2, top cover, 3, bottom cover, 4, static conductive rod, 5, dynamic conductive rod, 6, static contact, 7, dynamic contact, 8, static shielding case, 9, dynamic shielding case, 10, annular groove, 11, rubber sealing strip, 12, connecting plate, 13, bellows. DETAILED DESCRIPTION

[0016] The utility model will be further explained in detail in combination with the drawings.

[0017] In combination with the drawings Figures 1-4As shown, the shielding cover built-in vacuum switch tube, including shell body 1, the shell body 1 is ceramic material, the shell body 1 top end is connected with top cover 2, the shell body 1 bottom end is connected with bottom cover 3, the top cover 2 is penetrated and is provided with the static conducting rod 4 extending into the shell body 1, the bottom cover 3 is penetrated and is provided with the dynamic conducting rod 5 extending into the shell body 1, the static conducting rod 4 is equipped with the static contact 6 near the one end of dynamic conducting rod 5, the dynamic conducting rod 5 is equipped with the dynamic contact 7 for connecting with static contact 6, the dynamic conducting rod 5 is fixedly provided with the connecting plate 12 below dynamic contact 7, the connecting plate 12 and the top surface of bottom cover 3 are connected with the bellow 13 around dynamic conducting rod 5, the dynamic conducting rod 5 is slidably connected with bottom cover 3, the one end of dynamic conducting rod 5 is connected with external driving device outside shell body 1, the static conducting rod 4 is fixedly provided with the static shield 8 around static contact 6, the dynamic conducting rod 5 is fixedly provided with the dynamic shield 9, the static shield 8 is equipped with the annular groove 10 for matching dynamic shield 9, the other end of dynamic shield 9 is slidably placed in annular groove 10, the inner wall of static shield 8 is fixedly provided with the rubber sealing strip 11 closely attached to the inner wall of dynamic shield 9;

[0018] Through the above structure, in use, the end of dynamic conducting rod 5 is connected with external driving mechanism, when operating mechanism receives on command, driving mechanism opens to drive dynamic contact 7 to move towards static contact 6, makes dynamic contact 7 contact with static contact 6, thereby realizing the on of circuit, simultaneously, dynamic shield 9 slides in static shield 8, guarantees the sealing of shielding environment, in the moment of circuit on, due to the sudden increase of current, arc will be generated between dynamic contact 7 and static contact 6, because the vacuum state in shielding cover, there is no combustible gas or liquid, therefore, arc will be quickly extinguished after being generated;

[0019] When driving mechanism receives off command, will drive dynamic contact 7 to leave static contact 6, makes dynamic contact 7 separate from static contact 6, thereby realizing the off of circuit, in the moment of circuit off, due to the sudden decrease of current, arc will be generated between dynamic contact 7 and static contact 6, because the vacuum state in shielding cover, there is no combustible gas or liquid, therefore, arc will be quickly extinguished after being generated.

[0020] The utility model discloses in specific implementation, in use, the end of dynamic conducting rod 5 is connected with external driving mechanism, when operating mechanism receives on command, driving mechanism opens to drive dynamic contact 7 to move towards static contact 6, makes dynamic contact 7 contact with static contact 6, thereby realizing the on of circuit, simultaneously, dynamic shield 9 slides in static shield 8, guarantees the sealing of shielding environment, in the moment of circuit on, due to the sudden increase of current, arc will be generated between dynamic contact 7 and static contact 6, because the vacuum state in shielding cover, there is no combustible gas or liquid, therefore, arc will be quickly extinguished after being generated;

[0021] When the driving mechanism receives the disconnecting instruction, the moving contact 7 is driven to move away from the static contact 6, so that the moving contact 7 is separated from the static contact 6, thereby realizing the disconnection of the circuit. At the moment when the circuit is disconnected, due to the sudden decrease of the current, an arc is also generated between the moving contact 7 and the static contact 6. Since the shield cover is in a vacuum state, there is no combustible gas or liquid, so the arc is extinguished rapidly after being generated.

[0022] The above describes the utility model and its implementation, this kind of description is not restrictive, the embodiment of the utility model shown in the drawing is only one, the actual structure is not limited to this. In general, if the ordinary skilled person in the art is inspired, without departing from the utility model creation purpose, without creative design, the similar structure mode and embodiment of the technical scheme, which should belong to the protection scope of the utility model.

Claims

1. A shielded vacuum switch tube with built-in shield, comprising a shell body (1), characterized in that: The top end of the shell body (1) is connected with a top cover (2), and the bottom end of the shell body (1) is connected with a bottom cover (3). A static conducting rod (4) extends into the shell body (1) through the top cover (2). A dynamic conducting rod (5) extends into the shell body (1) through the bottom cover (3). The static conducting rod (4) is provided with a static contact (6) near one end of the dynamic conducting rod (5). The dynamic conducting rod (5) is provided with a dynamic contact (7) connected with the static contact (6). The static conducting rod (4) is fixedly provided with a static shield (8) around the static contact (6). The dynamic conducting rod (5) is fixedly provided with a dynamic shield (9). The static shield (8) is provided with an annular groove (10) matched with the dynamic shield (9). The other end of the dynamic shield (9) is slidably placed in the annular groove (10).

2. The shielded in-line vacuum interrupter tube of claim 1, wherein: The inner wall of the static shield (8) is fixedly provided with a rubber sealing strip (11) tightly attached to the inner wall of the dynamic shield (9).

3. The shielded in-line vacuum interrupter tube of claim 1, wherein: The dynamic conducting rod (5) is fixedly provided with a connecting plate (12) below the dynamic contact (7). The connecting plate (12) and the top surface of the bottom cover (3) are connected by a bellows (13) around the dynamic conducting rod (5).

4. The shielded in-line vacuum interrupter tube of claim 1, wherein: The dynamic conducting rod (5) is slidably connected with the bottom cover (3). One end of the dynamic conducting rod (5) outside the shell body (1) is connected with an external driving device.

5. The shielded in-line vacuum interrupter tube of claim 1, wherein: The shell body (1) is made of ceramic material.

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